| caryclark@google.com | 9e49fb6 | 2012-08-27 14:11:33 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| caryclark@google.com | 235f56a | 2012-09-14 14:19:30 +0000 | [diff] [blame] | 7 | #if !defined CUBIC_UTILITIES_H |
| 8 | #define CUBIC_UTILITIES_H |
| 9 | |
| caryclark@google.com | 8dcf114 | 2012-07-02 20:27:02 +0000 | [diff] [blame] | 10 | #include "DataTypes.h" |
| caryclark@google.com | 6d0032a | 2013-01-04 19:41:13 +0000 | [diff] [blame] | 11 | #include "SkTDArray.h" |
| caryclark@google.com | 8dcf114 | 2012-07-02 20:27:02 +0000 | [diff] [blame] | 12 | |
| caryclark@google.com | 73ca624 | 2013-01-17 21:02:47 +0000 | [diff] [blame] | 13 | double calcPrecision(const Cubic& cubic); |
| caryclark@google.com | 9d5f99b | 2013-01-22 12:55:54 +0000 | [diff] [blame] | 14 | #if SK_DEBUG |
| 15 | double calcPrecision(const Cubic& cubic, double t, double scale); |
| 16 | #endif |
| 17 | void chop_at(const Cubic& src, CubicPair& dst, double t); |
| caryclark@google.com | 9f60291 | 2013-01-24 21:47:16 +0000 | [diff] [blame^] | 18 | // FIXME: should be private static but public here for testing |
| 19 | void computeDelta(const Cubic& c1, double t1, double scale1, const Cubic& c2, double t2, |
| 20 | double scale2, double& delta1, double& delta2); |
| caryclark@google.com | 27accef | 2012-01-25 18:57:23 +0000 | [diff] [blame] | 21 | double cube_root(double x); |
| caryclark@google.com | d68bc30 | 2013-01-07 13:17:18 +0000 | [diff] [blame] | 22 | int cubic_to_quadratics(const Cubic& cubic, double precision, |
| 23 | SkTDArray<Quadratic>& quadratics); |
| caryclark@google.com | 73ca624 | 2013-01-17 21:02:47 +0000 | [diff] [blame] | 24 | void cubic_to_quadratics(const Cubic& cubic, double precision, SkTDArray<double>& ts); |
| caryclark@google.com | c682590 | 2012-02-03 22:07:47 +0000 | [diff] [blame] | 25 | void coefficients(const double* cubic, double& A, double& B, double& C, double& D); |
| caryclark@google.com | 9f60291 | 2013-01-24 21:47:16 +0000 | [diff] [blame^] | 26 | int cubicRootsValidT(double A, double B, double C, double D, double t[3]); |
| 27 | int cubicRootsReal(double A, double B, double C, double D, double s[3]); |
| caryclark@google.com | 73ca624 | 2013-01-17 21:02:47 +0000 | [diff] [blame] | 28 | void demote_cubic_to_quad(const Cubic& cubic, Quadratic& quad); |
| caryclark@google.com | 05c4bad | 2013-01-19 13:22:39 +0000 | [diff] [blame] | 29 | double dx_at_t(const Cubic& , double t); |
| 30 | double dy_at_t(const Cubic& , double t); |
| 31 | void dxdy_at_t(const Cubic& , double t, _Point& y); |
| caryclark@google.com | 73ca624 | 2013-01-17 21:02:47 +0000 | [diff] [blame] | 32 | int find_cubic_inflections(const Cubic& src, double tValues[]); |
| caryclark@google.com | 8dcf114 | 2012-07-02 20:27:02 +0000 | [diff] [blame] | 33 | bool rotate(const Cubic& cubic, int zero, int index, Cubic& rotPath); |
| caryclark@google.com | 9d5f99b | 2013-01-22 12:55:54 +0000 | [diff] [blame] | 34 | void sub_divide(const Cubic& src, double t1, double t2, Cubic& dst); |
| caryclark@google.com | 8dcf114 | 2012-07-02 20:27:02 +0000 | [diff] [blame] | 35 | void xy_at_t(const Cubic& , double t, double& x, double& y); |
| caryclark@google.com | 235f56a | 2012-09-14 14:19:30 +0000 | [diff] [blame] | 36 | |
| caryclark@google.com | 05c4bad | 2013-01-19 13:22:39 +0000 | [diff] [blame] | 37 | extern const int precisionUnit; |
| caryclark@google.com | 235f56a | 2012-09-14 14:19:30 +0000 | [diff] [blame] | 38 | #endif |